It is recommended to take calcium tablets orally with meals or 45 minutes after meals, because gastric acid has the greatest activity at this time, and calcium in calcium tablets is most easily absorbed. Also, for the three time periods of morning, noon and evening, due to the different absorption capacity of human stomach and intestines, the effect of calcium supplementation is enhanced in turn, and it is the strongest at night. It is suggested that it is better to eat two Jodi calcium tablets after dinner.